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Nutrients are divided into major categories, i.e. proteins, carbohydrates, lipids, water, minerals and vitamins. Nutritionists attempt to determine the nutrient needs of animal species to meet their requirements for the best performance,... more
Nutrients are divided into major categories, i.e. proteins, carbohydrates, lipids, water, minerals and vitamins. Nutritionists attempt to determine the nutrient needs of animal species to meet their requirements for the best performance, efficiency, etc. To accomplish this, there exists the need for sound knowledge of raw materials composition and nutrient requirements in different animal species.
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Background— Conjugated linoleic acids (CLAs), a group of fatty acids shown to have beneficial effects in animals, are also used as weight loss supplements. Recently, we reported that the t 10 c 12 CLA-isomer caused insulin resistance in... more
Background— Conjugated linoleic acids (CLAs), a group of fatty acids shown to have beneficial effects in animals, are also used as weight loss supplements. Recently, we reported that the t 10 c 12 CLA-isomer caused insulin resistance in abdominally obese men via unknown mechanisms. The aim of the present study was to examine whether CLA has isomer-specific effects on oxidative stress or inflammatory biomarkers and to investigate the relationship between these factors and induced insulin resistance. Methods and Results— In a double-blind placebo-controlled trial, 60 men with metabolic syndrome were randomized to one of 3 groups receiving t 10 c 12 CLA, a CLA mixture, or placebo for 12 weeks. Insulin sensitivity (euglycemic clamp), serum lipids, in vivo lipid peroxidation (determined as urinary 8-iso-PGF 2α [F2-isoprostanes]), 15-ketodihydro PGF 2α , plasma vitamin E, plasma C-reactive protein, tumor necrosis factor-α, and interleukin-6 were assessed before and after treatment. Supple...
Research Interests: Endocrinology, Free Radicals, Inflammation, Oxidative Stress, Medicine, and 13 moreInsulin Resistance, Internal Medicine, Insulin, Fatty acids, Vitamin E, Fragile X Syndrome, Clinical Sciences, C reactive protein, Public health systems and services research, Fatty Acid, Circulation, Conjugated linoleic acid, and Cardiovascular medicine and haematology
... AND RUMINOCOCCUS FLAVEFACIENS IN RUMEN OF HOLSTEIN CALVES, USING QUANTITATIVE PCR TECHNIQUE SAREMI B.*,NASERIAN AA,NASIRI MOHAMMAD REZA,MOHAMMADI AMIR * EDUCATION CENTER OF JIHAD-KESHAVARZI, ANIMAL SCIENCE ...
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Nutrients are divided into major categories, i.e. proteins, carbohydrates, lipids, water, minerals and vitamins. Nutritionists attempt to determine the nutrient needs of animal species to meet their requirements for the best performance,... more
Nutrients are divided into major categories, i.e. proteins, carbohydrates, lipids, water, minerals and vitamins. Nutritionists attempt to determine the nutrient needs of animal species to meet their requirements for the best performance, efficiency, etc. To accomplish this, there exists the need for sound knowledge of raw materials composition and nutrient requirements in different animal species.
Research Interests:
Research Interests:
From birth to weaning calves tolerate most stress include metabolic stress and parturition and at new environment obtained nutrients from milk instead of mother blood. In order to successful production of calves, a set of nutritional and... more
From birth to weaning calves tolerate most stress include metabolic stress and parturition and at new environment obtained nutrients from milk instead of mother blood. In order to successful production of calves, a set of nutritional and environmental management is needed. Calves mortality from birth to weaning is too much and cost effective for dairy industry. Instead, there is low mortality of heifers from weaning to parturition (1). Brown Swiss breed has low population in respect to Holstein in Iran. Low data is available about Brown Swiss population especially Brown Swiss calves. This study conducted to determine some information about Brown Swiss calves from birth to weaning and factors affecting economic traits at this period.
Milk quality control is one of the most important management tools used on dairy farms. Periodic recording and accurate analysis of data is needed. Management decisions and genetic evaluations are based on these data (Miglior, 2002;... more
Milk quality control is one of the most important management tools used on dairy farms. Periodic recording and accurate analysis of data is needed. Management decisions and genetic evaluations are based on these data (Miglior, 2002; Wiggans, 1985). Good nutrition management is important for economical production (improvedmilk yield and protein% and fat%) and health of animals (Schroeder, 1996). It is possible to evaluate the management system and nutrition program in a herd according to the protein% and fat% of milk. Cows that produce low milk with high fat are generally weak or have a low DMI. Low milk fat is caused by metabolic disorders or unbalanced feed composition. Low milk protein is due to lack of energy in diet (JafariKhorshidi, K. and J. Soltaniha. 1382). The aim of this study was to investigate the effects of protein % to fat % difference on milk production of Holstein dairy cows.
In recent years sugarcane had been farmed in large quantities in Iran especially in Khoozestan state due to proper climate. By-products that remain after processing of sugarcane are Lignocellulosis materials contain more than 20% lignin.... more
In recent years sugarcane had been farmed in large quantities in Iran especially in Khoozestan state due to proper climate. By-products that remain after processing of sugarcane are Lignocellulosis materials contain more than 20% lignin. 700000 ton bagasse pith is produced yearly at Khoozestan that might be used in animal nutrition because industrial usage is limited. Supplying fiber requirement of ruminants in Iran because of hot and dry climate needs attention to new sources of fiber. Bagasse had been used intact in some countries or just with molasses and urea in fattening farms. Bagasse had been used in low milk production cows (1). A new technology (Steam treatment) had open new zones to apply bagasse as steam treated bagasse in ruminant nutrition and had been shown that it is more digestible (2). This study was conducted to use hydrolyzed bagasse pith in high producing dairy cows in early lactation.
Variation in milk production is depended on different factors including: temperature, humidity and day length, which are changing at different months of year (Saremi et al., 2003, Naerian et al., 2003). Dairy industry sustain loss or make... more
Variation in milk production is depended on different factors including: temperature, humidity and day length, which are changing at different months of year (Saremi et al., 2003, Naerian et al., 2003). Dairy industry sustain loss or make profit according to amount of milk production or ingredients during year (Barbano et al., 1991). Traditional Bazaar and dairy industry are influenced by milk processing technology so that increased shelf time of products and whole milk and its products having the opportunity to distribute more effective (Erba et al., 1996). Seasonal changes in milk production leads to more processing of milk and changes in total solids of milk, which can influence price of milk (Stephenson et al., 1989). This study designed to investigate seasonal changes in milk production and its fat content in addition to investigating these changes between years (1988-2003).
A trial with different concentrations of DL-methionine (DLM) and DL-2-hydroxy-4-methylthiobutanoic acid (DL-HMTBA) in broiler feed was performed to investigate their effect on the meat quality parameters and the shelf life of breast... more
A trial with different concentrations of DL-methionine (DLM) and DL-2-hydroxy-4-methylthiobutanoic acid (DL-HMTBA) in broiler feed was performed to investigate their effect on the meat quality parameters and the shelf life of breast fillet. In total, fillets from 210 male broiler chickens (Ross 308) were tested in seven groups with 30 animals each. Three different concentrations (0.04, 0.12, and 0.32%; on an equimolar basis) of either DLM or DL-HMTBA were added to a basal diet, summing up to seven treatment groups. After slaughter, fillets were packed aerobically and stored at 4°C. The investigated parameters comprised measurements of microbial as well as physicochemical parameters, such as pH, drip loss, cooking loss, and color measurements. Additionally, sensory investigations were conducted and shelf life was calculated. Mean pH values were between 6.1 and 6.4. Drip loss values were low, with mean values below 0.4%. The cooking loss ranged between 22% and 28% on average. The fill...
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To determine the effect of different dietary Met sources on oxidative status, male Cobb 500 broiler chickens were fed from day of hatch to 26 days of age (d26) a diet deficient in sulfur amino acids (control) or a diet containing 0.22%... more
To determine the effect of different dietary Met sources on oxidative status, male Cobb 500 broiler chickens were fed from day of hatch to 26 days of age (d26) a diet deficient in sulfur amino acids (control) or a diet containing 0.22% DL-Met, 0.22% L-Met or 0.31% Met precursor, DL-2-hydroxy-4-(methylthio) butanoic acid (DL-HMTBA) to meet the Met + Cys requirements. Liver, breast muscle, duodenum, jejunum, and ileum were collected at day 10 (d10) and d26 to assay markers of oxidative stress, including total glutathione (TGSH), oxidized glutathione (GSSG), reduced glutathione (rGSH), protein carbonyls, thiobarbituric acid reactive substances (TBARS) and ferric reducing/antioxidant power (FRAP). In breast muscle, TGSH and rGSH were greater in L-Met and DL-HMTBA groups than in the control group (p < 0.05). An interaction of treatment and age was observed for TGSH in ileum (p = 0.01) and jejunum (p = 0.01), for GSSG in jejunum (p < 0.001), and for rGSH in ileum (p = 0.02). The rat...
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Common dietary supplemental methionine (Met) sources include DL-methionine (DL-Met) and the Met precursor DL-2-hydroxy-4-(methylthio) butanoic acid (DL-HMTBA). For bio-utilization, D-Met and DL-HMTBA are converted into L-Met through... more
Common dietary supplemental methionine (Met) sources include DL-methionine (DL-Met) and the Met precursor DL-2-hydroxy-4-(methylthio) butanoic acid (DL-HMTBA). For bio-utilization, D-Met and DL-HMTBA are converted into L-Met through oxidation and transamination. The objective of this study was to determine the effect of different dietary supplemental Met sources on gene expression and enzyme activity of Met oxidases in male broiler chickens. Liver, muscle, duodenum, jejunum, and ileum were collected at days 10 (d 10), 21 (d 21), and 26 (d 26) post-hatch from male broiler chickens that were fed a basal diet deficient in sulfur amino acids (SAA) (control), or the control diet supplemented with DL-Met, L-Met, or DL-HMTBA to meet SAA requirements. The mRNA abundance of D-Met oxidase, L-HMTBA oxidase, and D-HMTBA oxidase was measured by real-time PCR, and oxidase activities were measured using colorimetric assays (n = 5). Liver expressed more D- and L-HMTBA oxidase mRNA, while breast mus...
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The aim of this study was to investigate the influence of different methionine sources and concentrations on the quality and spoilage process of broiler meat. The trial was comprised of 7 treatment groups: one basal group (suboptimal in... more
The aim of this study was to investigate the influence of different methionine sources and concentrations on the quality and spoilage process of broiler meat. The trial was comprised of 7 treatment groups: one basal group (suboptimal in Methionine+Cysteine; i.e., 0.89, 0.74, 0.69% in DM SID Met+Cys in starter, grower, and finisher diets, respectively) and 3 doses (0.10, 0.25, and 0.40%) of either DL-Methionine (DLM) or DL-2-hydroxy-4-methylthio butanoic acid (DL-HMTBA) on an equimolar basis of the DLM-supplemented groups. The broilers were fed the diets for 35 d, then slaughtered and processed. The filets were aerobically packed and stored under temperature controlled conditions at 4°C. Meat quality investigations were comprised of microbial investigations (total viable count and Pseudomonas spp.), pH and drip loss measurements of the filets. The shelf life of the meat samples was determined based on sensory parameters. After slaughtering, all supplemented meat samples showed a high...
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Methionine is the first limiting amino acid in all poultry corn-soybean based diets. The objective of this study was to determine the effect of supplementation of L-methionine (L-Met), DL-methionine (DL-Met), and the methionine analogue,... more
Methionine is the first limiting amino acid in all poultry corn-soybean based diets. The objective of this study was to determine the effect of supplementation of L-methionine (L-Met), DL-methionine (DL-Met), and the methionine analogue, DL-2-hydroxy-4-(methylthio) butanoic acid (DL-HMTBA), on biochemical and physiological parameters of broiler chickens. Male Cobb-500 broilers were fed from day of hatch (d 0) to d 35 posthatch using a basal diet deficient in methionine plus cysteine (Met + Cys) (control), or the basal diet supplemented with 0.22% DL-Met, 0.22% L-Met, or 0.31% DL-HMTBA to meet the Met + Cys requirements. Tissue (liver, duodenum, jejunum, and ileum) and blood samples were collected at various ages, from d 0 to d 35. Performance of the birds, blood parameters (e.g., acute phase proteins, white blood cell counts), mRNA expression of intestinal nutrient transporters and DNA methylation properties of liver tissues were examined. Both body weight and feed efficiency were i...
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In order to investigate the effect of physical form of diet on performance and some blood metabolites, eighteen female, Brown Swiss calves weighing 39.5±1.2 kg after birth were randomly assigned to three treatments including: mash starter... more
In order to investigate the effect of physical form of diet on performance and some blood metabolites, eighteen female, Brown Swiss calves weighing 39.5±1.2 kg after birth were randomly assigned to three treatments including: mash starter (M.S), pelleted starter (P.S), and pelleted and rolled starter (PRS). Diets were formulated to be isonitrogenous. Weight gain of calves has significant difference in treatments (P<0.05).Weight gain in MS was lower (45.16 kg) than PS (53.25 kg) and PMS (54.08 kg). Total intake of starter without time spot in MS (68.14 kg) was lower than PS (80.03 kg) and PMS (85.69 kg). Feed efficiency had no significant difference in treatments. Crude protein and organic matter digestibility in MS were lower than other treatments (P<0.05). Treatments had no significant effects on blood glucose content, but concentration of blood urea nitrogen (BUN) in MS was higher than other treatments (P<0.05). In conclusion, starter in form of pellet and mixture of pell...